Chuck for paper rolls



Sept. 15, 1931. T. T. PomaV CHUCK FOR PAPER ROLLS Filed oct 25. 1927 nV//f/ /.////////4.//

Patented Sept. l5, 193i UNrrED STATES PATENT ermee TURNER T. POPE, OF HOUSTON, TEXAS, ASSIGNOaR QF ONE-EIALF T0A Gu. L. IVIIIVIS,v 0F

HOUSTON, TEXAS CHUCK FOR PAPER BOTLLS.

Application filed October 25, 19,27. Serie.; No.. 228,583.

My invention relates to chucks to grip and clamp a roll of print paper, or the like, to a shaft Jfrom which it is unreeled in use,

In printing presses, where my invention finds its most common use, the paper is 1n the form of a. long web wound upon a core and it is mounted upon a shaft and a chuck is employed to secure the roll of paper to the shaft. The shaft is allowed to rotate when the paper is fed to the press.

Some diiiiculty is experienced in providing a chuck which can be quickly operated and which will hold the roll clamped to the shaft even under high tension and it is an object to provide a chuck which will overcome this diiiiculty.

It is desired that the chuck be automaticallv adjustable to grip the roll firmly when tension is exerted in either direction thereim, so that the chucks may be employed at either end of the roll.

lt is also an aim to provide means to quickly grip the chuck to a smooth shaft without mutilating the said shaft in use.

Referring to the drawings herewith, FiO. l is a broken side elevation of a shaft with my chucks thereon and a paper roll thereon, said roll being in central vertical section. Fig. 2 is a central longitudinal section of one of the chucks. Fig. 3 is an end view of the chuck. Fig. 4 is a. broken side elevation with some parts broken away for greater clearness.

rlhe paper roll usually consists of a cen- "tral core l with the web of paper 2 wound thereon. Said core Vlits loosely upon the shaft 3 which may be mounted for rotation in any desired manner, not shown. Each end of the core, which is usually of a heavy `ipasteboard, is formed with a notch or slot el formed to receive a co-operating member on the chuck which will be presently described.

Chucks are employed at both ends of the roll Each chuck comprises an inner mandrel 5 shaped tol'it closely upon the shaft'. This mandi-ell is a sleeve, cylindrical.i in shapewith arad'ially exten-@lling head1' 6fon one end', the outer surfaceo' which may be knurledi to better serve as a hand hold'.

rliie inner surface of the head. 6 isf recessed' toy receive toothed; plate'l The recess is undercut, or morticed to limift the; inward move-ment of the plfate a screwY 8 in the end of the head overlaps the plate at thel outer en'd'suiiieientl'yto`r prevent moval of the plate from its. recess. until the said screw is removed. rEhio` pls'ate is adapt` ed' to be moved into clamping engagement with the shaft S byl means'` of a set screw. 9i extending radially through; the head, as shown` in Fig.. 4l. It willi bef obvious that the chuck will be intrpduced intot the end olli the rolil and'A when thus engaged with the roll, thev chuck wilil he secured rigidly to' the shaft by the screwing up. of the set screw: 9i.

@n the outer suiaceof the mandrel 5i is a.- tapered sleeve 1101 Said sleeve has a head. ll iitting against the head1' 6 of themandrel', said.` head having on its. forward, side al sharpened outer edge 12F formed by dishiingtlieinner-tacev of the headjll. 'llhesl'eeve 110. is rotatable upon the mandrel. 5y and lime ited in the extent of itsy rotation` by means of` pins.-

which: are screwed radially through the head lll trom. opposite sides off` the said head and adaptedi to project into slots or openings 14C; ini the mandrehV These pins are threaded on their outer ends tot screw within the head, the inner ends-1 being smooth and adapted: to project part way throughV the thickness of. thel mandreli 5f. within the slots'. 1:41. A squared recess, in-` dicated 15,. is formed in the heads: oli thesepins; to; receive a? wrench.

The slotsllin themarrdrelare', angular in shape7 as shown ini ligl.A 4,. andA it` will be noted that when the sleeve lO-is rotated on the mandrel 5,A the pins, L3.- willslide. within the slot 14 so that when moved in either direction from a central point 16, the pin will be moved forwardly so as to force the sleeve 10 inwardly against the roll of paper. There is a forwardly extending lug 17 formed on one side of the sleeve adjacent the head 11, said lug being adapted to fit within the slot or recess 4 in the core 1 of the roll.

In assembling the chuck, the threaded pins 13 will be withdrawn in the head sufliciently to allow the sleeve to be fitted over the mandrel 5. The pins will then be screwed in place so as to engage within 15 the openings 14, as shown in Fig. 2. IVhen the paper roll has been moved onto the shaft 3 a chuck will be moved along the shaft so as to engage within each end of the roll with the lugs 17 fitting within the 2o recess 4 in the core. The sharp forward edge 12 upon the head of the sleeve will fit around the outer side of the core and within the first few windings of the paper and will serve to grip the same rmly at each end. IVhen in this position, the set screw 9 upon the mandrel will bev screwed down tightly to force the jaws 7 frictionally against the shaft and hold the mandrel rigidly in place. 'When the paper is thereafter 3o unreeled from the roll, the ordinary tension upon the paper will tend to hold the pins 13 about centrally of the slot 14 in the mandrel. Then further tension is exerted upon the web which might tend to disengage the roll from the chuck, the sleeve 10 will tend to rotate upon the mandrel and force the pins 13 toward the end of the slot on an inclination such as to move the sleeves 10 inwardly and more firmly engage 1o-the roll and thus prevent relative rotation due to the increased tension. The slots 14 are inclined inwardly in both directions so as to make it possible to use the chuck at either end of the roll interchangeably and thus necessitate the use of but one type of chuck. Furthermore, it sometimes becomes desirable to use the device in a reverse direction, and in such case, the action is the same as in the forward direction.

The advantages of the structure lie in the vfact that the chuck is easily inserted in position in the ends of the roll and securely gripped to the shaft without the necessity of any co-operating part upon the shaft :6, the engagement of the jaws 7 being entirely sufhcient to hold the chuck rigidly against the shaft. The automatic arrangement whereby the chuck will grip the roll more firmly under increased tension is of particular value and the simplicity of the structure disclosed makes the device economical to manufacture and use.

Having thus described the invention, what I claim as new is:

A chuck for securing rolls of paper upon TURNER T. POPE. 

